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UltraSoil - Tree Pit Mix

UltraSoil - Tree Pit Mix


Living Earth’s Urban Tree Pit Mix is our premium engineered mix prepared specifically for tree pit systems or for use in Silva Cell systems. Blended with our amazing BioGro certified organic compost, this top quality pit mix is the choice of many Auckland landscape Architects and landscapers. It is widely specified in large scale commercial and domestic landscape project work.



This product contains no weeds. None whatsoever. Nada. Zip. Zero. Zilch.


Certified 100% Organic by BioGro, New Zealand's leading organic certification agency. No chemicals here, my friend.


This product performs CPR on your soil, conditioning and improving its structure. Clear!


       pH range

    5.5 - 7.0      

       Electrical conductivity (mS/cm)*

    ≤ 2.5      



       Germination score (out of 7)


       Bulk density - wet wt basis (kg per m³)

    800 to 1100      

    Analysed in a 1:1.5 water extraction.


    We take great care to bring you premium product. Our products are created from recovered green waste and
    are compliant to the New Zealand Standard NZS: 4454 for Composts, Soil Conditioners and Mulches. Click here for more information about NZS4454


    When handling larger volumes of Urban Tree Pit Mix, ensure stockpiles are covered to give protection against weather conditions.


    • Living Earth compost
    • Sand
    • Quality loam topsoil

    Approximately one truck & trailer holds 28m³. For blowing, contact us for current moisture and bulk density levels.


    The Project specifier will generally detail the installation instructions for the tree pit media. In the absence of these, you can view and download the construction and operation and maintenance guides here.

    • Apply Living Earth More than Mulch over the tree pit mix to a depth of 50mm to assist in maintaining soil moisture.


Step 1

This product must be mixed into your existing soil.

Step 2

Dig Living Earth Organic Compost through the soil in your garden or your raised garden beds before planting. Dig a 50mm layer of compost into your soil.

Step 3

Feed your plants with Living Earth Organic Liquid Compost. It's the perfect partner for your garden.

Step 4

For best results apply Living Earth Organic Compost twice yearly. Your plants will dig it!


See the full list of Living Earth FAQs here.

  • Why is Living Earth Compost so good?

    Living Earth Compost is made from only the best ingredients - clean, green organic material. It is brewed to perfection, then thoroughly tested so we know it is good.

  • Where can I buy Living Earth products?

    We sell our 40L bags and landscape yard products in selected stockists, see here for more details. We also deliver bulk bags of our products in selected Auckland regions. Simply head to one of our bulk bag product pages to see if we deliver in your area.

  • How does Living Earth Compost become 100% weed-free?

    Thanks to the activity of all the worker bugs breaking down the material in the composting process, the temperature quickly reaches above 55 degrees. After three days at this heat all weed seeds are killed.

  • Is there a qualifying standard for compost produced in NZ?

    Yes, there is. Living Earth Compost conforms to NZ standard 4454:2005, a standard that provides assurance that all composted matter is safe to use for the home gardener. The standard sets a quality level that Living Earth exceeds in the compost it produces.

  • How does Living Earth test its compost?

    We test every batch of compost at our on-site lab and with growth trials to ensure quality standards are met with the plants growing healthily. Other independent lab tests are performed to check levels of nutrients and to ensure the compost meets NZ standards.